Also I believe there should be a Limit on Justu by rank
Example
(ranks not mentioned have no limit)
Genin:
S rank - Limit 0
A rank - Limit 1
B rank - Limit 2
C rank - Limit 4
Chuunin
S Rank - Limit 1
A Rank - Limt 3
B Rank - Limit 5
Jounin
S Rank - Limit 2
A Rank - Limit 5
Kage
S Rank - Limit 3
And so all of us are sure what would rank where
E-Ranked:
E-Ranked techniques are the most basic that any ninja could know. These
techniques are generally learned at the Ninja Academy. All academy
students are expected to know all of these techniques before they
become Genin. Example: Bunshin no Jutsu (Clone Jutsu)
D-Ranked:
D-Rank jutsu are the next up, from E-Rank. These are the basic jutsu
that Genin are generally learning, after getting out of the academy.
Your average Genin will only know D-Ranked techniques until they join a
team.
Example: Narakumi no Jutsu (Demonic Illusion: Hell Viewing Justu)
C-Ranked:
C-Ranked jutsu, if you have not guessed, are Chuunin ranked
techniques.. Some Genin may have one or two of these techniques as
their secret weapon, or to try to impress people in the Chuunin Exams,
with the Chuunin Exams being the test to see what Genin are ready to
become Chuunin.
Example: Kuchiyose no Jutsu (Summoning Jutsu)
B-Ranked:
B-Rank jutsu are the jutsu that you would normally see Jounin use,
however some Chuunin may know a few of these techniques. These
techniques are considered very powerful, and deadly. Also, generally
these techniques will take up a lot of chakra.
Example: Kage Bunshin no Jutsu (Shadow Clone Jutsu)
A-Ranked:
These jutsu are generally Jounin level and forbidden techniques. Many
Jounin create their own special techniques that fall under this ranking
of jutsu, but these are mainly known to Kage level ninja.
Example: Chidori, Rasengan
S-Ranked: These jutsu are usually forbidden to learn. Those who
use these usually run away from their village because it is illegal to
do so.
Example: Edo Tensei ( Impure World Resurrection)
Also this is just a Suggestion